A display featuring missiles and a portrait of Iranian Ayatollah Ali Khamenei is seen at Baharestan Square in Tehran, Sept. 27, 2017. Photo: Nazanin Tabatabaee Yazdi / TIMA via Reuters.

The European Union on Tuesday urged Iran to reverse its scaled up uranium enrichment that breaches a nuclear arms control deal it agreed in 2015.

“We continue to urge Iran not take further measures that undermine the nuclear deal to stop and to reverse all activities that are inconsistent with the JCPOA, including the production of low-enriched uranium,” an EU spokeswoman told reporters, referring to the deal’s formal name, the Joint Comprehensive Plan of Action (JCPOA).

Iran has said it will boost its uranium enrichment in a few hours above a cap set by the nuclear deal, a move that could mean the return of all economic sanctions on Tehran.